Bug 1980308 (CVE-2021-35197)

Summary:	CVE-2021-35197 mediawiki: blocked users are able to purge pages impacting Integrity
Product:	[Other] Security Response	Reporter:	Marian Rehak <mrehak>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	aos-bugs, axel.thimm, bmontgom, eparis, jburrell, jokerman, mike, nstielau, puiterwijk, shurley, sponnaga
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	mediawiki 1.31.15, mediawiki 1.35.3, mediawiki 1.36.1	Doc Type:	If docs needed, set a value
Doc Text:	An improper authorization vulnerability was found in mediawiki. Mediawiki bots may have unintended API access even when a sitewide block has been applied. An attacker can use this vulnerability to potentially utilize a bot to access the mediawiki API and conduct actions like purge pages.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-07-12 04:40:22 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1980309
Bug Blocks:	1980310

Description Marian Rehak 2021-07-08 10:38:14 UTC

In MediaWiki before 1.31.15, 1.32.x through 1.35.x before 1.35.3, and 1.36.x before 1.36.1, bots have certain unintended API access. When a bot account has a "sitewide block" applied, it is able to still "purge" pages through the MediaWiki Action API (which a "sitewide block" should have prevented).

References:

https://lists.wikimedia.org/hyperkitty/list/mediawiki-announce@lists.wikimedia.org/thread/YR3X4L2CPSEJVSY543AWEO65TD6APXHP/

Comment 1 Marian Rehak 2021-07-08 10:38:53 UTC

Created mediawiki tracking bugs for this issue:

Affects: fedora-all [bug 1980309]

Comment 2 Product Security DevOps Team 2021-07-12 04:40:22 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-35197